diff --git a/modules/fdlibm/src/fdlibm.h b/modules/fdlibm/src/fdlibm.h
--- a/modules/fdlibm/src/fdlibm.h
+++ b/modules/fdlibm/src/fdlibm.h
@@ -12,499 +12,49 @@
 /*
  * from: @(#)fdlibm.h 5.1 93/09/24
  * $FreeBSD$
  */
 
 #ifndef _MATH_H_
 #define	_MATH_H_
 
-#include <sys/cdefs.h>
-#include <sys/_types.h>
-#include <machine/_limits.h>
-
-/*
- * ANSI/POSIX
- */
-extern const union __infinity_un {
-	unsigned char	__uc[8];
-	double		__ud;
-} __infinity;
-
-extern const union __nan_un {
-	unsigned char	__uc[sizeof(float)];
-	float		__uf;
-} __nan;
-
-#if __GNUC_PREREQ__(3, 3) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800)
-#define	__MATH_BUILTIN_CONSTANTS
-#endif
-
-#if __GNUC_PREREQ__(3, 0) && !defined(__INTEL_COMPILER)
-#define	__MATH_BUILTIN_RELOPS
-#endif
-
-#ifdef __MATH_BUILTIN_CONSTANTS
-#define	HUGE_VAL	__builtin_huge_val()
-#else
-#define	HUGE_VAL	(__infinity.__ud)
-#endif
-
-#if __ISO_C_VISIBLE >= 1999
-#define	FP_ILOGB0	(-__INT_MAX)
-#define	FP_ILOGBNAN	__INT_MAX
-
-#ifdef __MATH_BUILTIN_CONSTANTS
-#define	HUGE_VALF	__builtin_huge_valf()
-#define	HUGE_VALL	__builtin_huge_vall()
-#define	INFINITY	__builtin_inff()
-#define	NAN		__builtin_nanf("")
-#else
-#define	HUGE_VALF	(float)HUGE_VAL
-#define	HUGE_VALL	(long double)HUGE_VAL
-#define	INFINITY	HUGE_VALF
-#define	NAN		(__nan.__uf)
-#endif /* __MATH_BUILTIN_CONSTANTS */
-
-#define	MATH_ERRNO	1
-#define	MATH_ERREXCEPT	2
-#define	math_errhandling	MATH_ERREXCEPT
-
-#define	FP_FAST_FMAF	1
-
-/* Symbolic constants to classify floating point numbers. */
-#define	FP_INFINITE	0x01
-#define	FP_NAN		0x02
-#define	FP_NORMAL	0x04
-#define	FP_SUBNORMAL	0x08
-#define	FP_ZERO		0x10
-
-#if (__STDC_VERSION__ >= 201112L && defined(__clang__)) || \
-    __has_extension(c_generic_selections)
-#define	__fp_type_select(x, f, d, ld) _Generic((x),			\
-    float: f(x),							\
-    double: d(x),							\
-    long double: ld(x),							\
-    volatile float: f(x),						\
-    volatile double: d(x),						\
-    volatile long double: ld(x),					\
-    volatile const float: f(x),						\
-    volatile const double: d(x),					\
-    volatile const long double: ld(x),					\
-    const float: f(x),							\
-    const double: d(x),							\
-    const long double: ld(x))
-#elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus)
-#define	__fp_type_select(x, f, d, ld) __builtin_choose_expr(		\
-    __builtin_types_compatible_p(__typeof(x), long double), ld(x),	\
-    __builtin_choose_expr(						\
-    __builtin_types_compatible_p(__typeof(x), double), d(x),		\
-    __builtin_choose_expr(						\
-    __builtin_types_compatible_p(__typeof(x), float), f(x), (void)0)))
-#else
-#define	 __fp_type_select(x, f, d, ld)					\
-    ((sizeof(x) == sizeof(float)) ? f(x)				\
-    : (sizeof(x) == sizeof(double)) ? d(x)				\
-    : ld(x))
-#endif
-
-#define	fpclassify(x) \
-	__fp_type_select(x, __fpclassifyf, __fpclassifyd, __fpclassifyl)
-#define	isfinite(x) __fp_type_select(x, __isfinitef, __isfinite, __isfinitel)
-#define	isinf(x) __fp_type_select(x, __isinff, __isinf, __isinfl)
-#define	isnan(x) \
-	__fp_type_select(x, __inline_isnanf, __inline_isnan, __inline_isnanl)
-#define	isnormal(x) __fp_type_select(x, __isnormalf, __isnormal, __isnormall)
-
-#ifdef __MATH_BUILTIN_RELOPS
-#define	isgreater(x, y)		__builtin_isgreater((x), (y))
-#define	isgreaterequal(x, y)	__builtin_isgreaterequal((x), (y))
-#define	isless(x, y)		__builtin_isless((x), (y))
-#define	islessequal(x, y)	__builtin_islessequal((x), (y))
-#define	islessgreater(x, y)	__builtin_islessgreater((x), (y))
-#define	isunordered(x, y)	__builtin_isunordered((x), (y))
-#else
-#define	isgreater(x, y)		(!isunordered((x), (y)) && (x) > (y))
-#define	isgreaterequal(x, y)	(!isunordered((x), (y)) && (x) >= (y))
-#define	isless(x, y)		(!isunordered((x), (y)) && (x) < (y))
-#define	islessequal(x, y)	(!isunordered((x), (y)) && (x) <= (y))
-#define	islessgreater(x, y)	(!isunordered((x), (y)) && \
-					((x) > (y) || (y) > (x)))
-#define	isunordered(x, y)	(isnan(x) || isnan(y))
-#endif /* __MATH_BUILTIN_RELOPS */
-
-#define	signbit(x) __fp_type_select(x, __signbitf, __signbit, __signbitl)
-
-typedef	__double_t	double_t;
-typedef	__float_t	float_t;
-#endif /* __ISO_C_VISIBLE >= 1999 */
-
-/*
- * XOPEN/SVID
- */
-#if __BSD_VISIBLE || __XSI_VISIBLE
-#define	M_E		2.7182818284590452354	/* e */
-#define	M_LOG2E		1.4426950408889634074	/* log 2e */
-#define	M_LOG10E	0.43429448190325182765	/* log 10e */
-#define	M_LN2		0.69314718055994530942	/* log e2 */
-#define	M_LN10		2.30258509299404568402	/* log e10 */
-#define	M_PI		3.14159265358979323846	/* pi */
-#define	M_PI_2		1.57079632679489661923	/* pi/2 */
-#define	M_PI_4		0.78539816339744830962	/* pi/4 */
-#define	M_1_PI		0.31830988618379067154	/* 1/pi */
-#define	M_2_PI		0.63661977236758134308	/* 2/pi */
-#define	M_2_SQRTPI	1.12837916709551257390	/* 2/sqrt(pi) */
-#define	M_SQRT2		1.41421356237309504880	/* sqrt(2) */
-#define	M_SQRT1_2	0.70710678118654752440	/* 1/sqrt(2) */
-
-#define	MAXFLOAT	((float)3.40282346638528860e+38)
-extern int signgam;
-#endif /* __BSD_VISIBLE || __XSI_VISIBLE */
-
-#if __BSD_VISIBLE
-#if 0
-/* Old value from 4.4BSD-Lite math.h; this is probably better. */
-#define	HUGE		HUGE_VAL
-#else
-#define	HUGE		MAXFLOAT
-#endif
-#endif /* __BSD_VISIBLE */
-
-/*
- * Most of these functions depend on the rounding mode and have the side
- * effect of raising floating-point exceptions, so they are not declared
- * as __pure2.  In C99, FENV_ACCESS affects the purity of these functions.
- */
-__BEGIN_DECLS
-/*
- * ANSI/POSIX
- */
-int	__fpclassifyd(double) __pure2;
-int	__fpclassifyf(float) __pure2;
-int	__fpclassifyl(long double) __pure2;
-int	__isfinitef(float) __pure2;
-int	__isfinite(double) __pure2;
-int	__isfinitel(long double) __pure2;
-int	__isinff(float) __pure2;
-int	__isinf(double) __pure2;
-int	__isinfl(long double) __pure2;
-int	__isnormalf(float) __pure2;
-int	__isnormal(double) __pure2;
-int	__isnormall(long double) __pure2;
-int	__signbit(double) __pure2;
-int	__signbitf(float) __pure2;
-int	__signbitl(long double) __pure2;
-
-static __inline int
-__inline_isnan(__const double __x)
-{
-
-	return (__x != __x);
-}
-
-static __inline int
-__inline_isnanf(__const float __x)
-{
-
-	return (__x != __x);
-}
-
-static __inline int
-__inline_isnanl(__const long double __x)
-{
-
-	return (__x != __x);
-}
-
-/*
- * Version 2 of the Single UNIX Specification (UNIX98) defined isnan() and
- * isinf() as functions taking double.  C99, and the subsequent POSIX revisions
- * (SUSv3, POSIX.1-2001, define it as a macro that accepts any real floating
- * point type.  If we are targeting SUSv2 and C99 or C11 (or C++11) then we
- * expose the newer definition, assuming that the language spec takes
- * precedence over the operating system interface spec.
- */
-#if	__XSI_VISIBLE > 0 && __XSI_VISIBLE < 600 && __ISO_C_VISIBLE < 1999
-#undef isinf
-#undef isnan
-int	isinf(double);
-int	isnan(double);
-#endif
-
 double	acos(double);
 double	asin(double);
 double	atan(double);
 double	atan2(double, double);
-double	cos(double);
-double	sin(double);
-double	tan(double);
 
 double	cosh(double);
 double	sinh(double);
 double	tanh(double);
 
 double	exp(double);
-double	frexp(double, int *);	/* fundamentally !__pure2 */
-double	ldexp(double, int);
 double	log(double);
 double	log10(double);
-double	modf(double, double *);	/* fundamentally !__pure2 */
 
 double	pow(double, double);
-double	sqrt(double);
+double	fabs(double);
 
-double	ceil(double);
-double	fabs(double) __pure2;
 double	floor(double);
-double	fmod(double, double);
+double	trunc(double);
+double	ceil(double);
 
-/*
- * These functions are not in C90.
- */
-#if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999 || __XSI_VISIBLE
 double	acosh(double);
 double	asinh(double);
 double	atanh(double);
 double	cbrt(double);
-double	erf(double);
-double	erfc(double);
-double	exp2(double);
 double	expm1(double);
-double	fma(double, double, double);
 double	hypot(double, double);
-int	ilogb(double) __pure2;
-double	lgamma(double);
-long long llrint(double);
-long long llround(double);
 double	log1p(double);
 double	log2(double);
-double	logb(double);
-long	lrint(double);
-long	lround(double);
-double	nan(const char *) __pure2;
-double	nextafter(double, double);
-double	remainder(double, double);
-double	remquo(double, double, int *);
 double	rint(double);
-#endif /* __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999 || __XSI_VISIBLE */
-
-#if __BSD_VISIBLE || __XSI_VISIBLE
-double	j0(double);
-double	j1(double);
-double	jn(int, double);
-double	y0(double);
-double	y1(double);
-double	yn(int, double);
-
-#if __XSI_VISIBLE <= 500 || __BSD_VISIBLE
-double	gamma(double);
-#endif
-
-#if __XSI_VISIBLE <= 600 || __BSD_VISIBLE
-double	scalb(double, double);
-#endif
-#endif /* __BSD_VISIBLE || __XSI_VISIBLE */
-
-#if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999
-double	copysign(double, double) __pure2;
-double	fdim(double, double);
-double	fmax(double, double) __pure2;
-double	fmin(double, double) __pure2;
+double	copysign(double, double);
 double	nearbyint(double);
-double	round(double);
-double	scalbln(double, long);
 double	scalbn(double, int);
-double	tgamma(double);
-double	trunc(double);
-#endif
-
-/*
- * BSD math library entry points
- */
-#if __BSD_VISIBLE
-double	drem(double, double);
-int	finite(double) __pure2;
-int	isnanf(float) __pure2;
-
-/*
- * Reentrant version of gamma & lgamma; passes signgam back by reference
- * as the second argument; user must allocate space for signgam.
- */
-double	gamma_r(double, int *);
-double	lgamma_r(double, int *);
-
-/*
- * IEEE Test Vector
- */
-double	significand(double);
-#endif /* __BSD_VISIBLE */
-
-/* float versions of ANSI/POSIX functions */
-#if __ISO_C_VISIBLE >= 1999
-float	acosf(float);
-float	asinf(float);
-float	atanf(float);
-float	atan2f(float, float);
-float	cosf(float);
-float	sinf(float);
-float	tanf(float);
-
-float	coshf(float);
-float	sinhf(float);
-float	tanhf(float);
-
-float	exp2f(float);
-float	expf(float);
-float	expm1f(float);
-float	frexpf(float, int *);	/* fundamentally !__pure2 */
-int	ilogbf(float) __pure2;
-float	ldexpf(float, int);
-float	log10f(float);
-float	log1pf(float);
-float	log2f(float);
-float	logf(float);
-float	modff(float, float *);	/* fundamentally !__pure2 */
-
-float	powf(float, float);
-float	sqrtf(float);
 
 float	ceilf(float);
-float	fabsf(float) __pure2;
 float	floorf(float);
-float	fmodf(float, float);
-float	roundf(float);
-
-float	erff(float);
-float	erfcf(float);
-float	hypotf(float, float);
-float	lgammaf(float);
-float	tgammaf(float);
 
-float	acoshf(float);
-float	asinhf(float);
-float	atanhf(float);
-float	cbrtf(float);
-float	logbf(float);
-float	copysignf(float, float) __pure2;
-long long llrintf(float);
-long long llroundf(float);
-long	lrintf(float);
-long	lroundf(float);
-float	nanf(const char *) __pure2;
 float	nearbyintf(float);
-float	nextafterf(float, float);
-float	remainderf(float, float);
-float	remquof(float, float, int *);
 float	rintf(float);
-float	scalblnf(float, long);
-float	scalbnf(float, int);
 float	truncf(float);
 
-float	fdimf(float, float);
-float	fmaf(float, float, float);
-float	fmaxf(float, float) __pure2;
-float	fminf(float, float) __pure2;
-#endif
-
-/*
- * float versions of BSD math library entry points
- */
-#if __BSD_VISIBLE
-float	dremf(float, float);
-int	finitef(float) __pure2;
-float	gammaf(float);
-float	j0f(float);
-float	j1f(float);
-float	jnf(int, float);
-float	scalbf(float, float);
-float	y0f(float);
-float	y1f(float);
-float	ynf(int, float);
-
-/*
- * Float versions of reentrant version of gamma & lgamma; passes
- * signgam back by reference as the second argument; user must
- * allocate space for signgam.
- */
-float	gammaf_r(float, int *);
-float	lgammaf_r(float, int *);
-
-/*
- * float version of IEEE Test Vector
- */
-float	significandf(float);
-#endif	/* __BSD_VISIBLE */
-
-/*
- * long double versions of ISO/POSIX math functions
- */
-#if __ISO_C_VISIBLE >= 1999
-long double	acoshl(long double);
-long double	acosl(long double);
-long double	asinhl(long double);
-long double	asinl(long double);
-long double	atan2l(long double, long double);
-long double	atanhl(long double);
-long double	atanl(long double);
-long double	cbrtl(long double);
-long double	ceill(long double);
-long double	copysignl(long double, long double) __pure2;
-long double	coshl(long double);
-long double	cosl(long double);
-long double	erfcl(long double);
-long double	erfl(long double);
-long double	exp2l(long double);
-long double	expl(long double);
-long double	expm1l(long double);
-long double	fabsl(long double) __pure2;
-long double	fdiml(long double, long double);
-long double	floorl(long double);
-long double	fmal(long double, long double, long double);
-long double	fmaxl(long double, long double) __pure2;
-long double	fminl(long double, long double) __pure2;
-long double	fmodl(long double, long double);
-long double	frexpl(long double, int *); /* fundamentally !__pure2 */
-long double	hypotl(long double, long double);
-int		ilogbl(long double) __pure2;
-long double	ldexpl(long double, int);
-long double	lgammal(long double);
-long long	llrintl(long double);
-long long	llroundl(long double);
-long double	log10l(long double);
-long double	log1pl(long double);
-long double	log2l(long double);
-long double	logbl(long double);
-long double	logl(long double);
-long		lrintl(long double);
-long		lroundl(long double);
-long double	modfl(long double, long double *); /* fundamentally !__pure2 */
-long double	nanl(const char *) __pure2;
-long double	nearbyintl(long double);
-long double	nextafterl(long double, long double);
-double		nexttoward(double, long double);
-float		nexttowardf(float, long double);
-long double	nexttowardl(long double, long double);
-long double	powl(long double, long double);
-long double	remainderl(long double, long double);
-long double	remquol(long double, long double, int *);
-long double	rintl(long double);
-long double	roundl(long double);
-long double	scalblnl(long double, long);
-long double	scalbnl(long double, int);
-long double	sinhl(long double);
-long double	sinl(long double);
-long double	sqrtl(long double);
-long double	tanhl(long double);
-long double	tanl(long double);
-long double	tgammal(long double);
-long double	truncl(long double);
-#endif /* __ISO_C_VISIBLE >= 1999 */
-
-#if __BSD_VISIBLE
-long double	lgammal_r(long double, int *);
-void		sincos(double, double *, double *);
-void		sincosf(float, float *, float *);
-void		sincosl(long double, long double *, long double *);
-#endif
-
-__END_DECLS
-
 #endif /* !_MATH_H_ */
